From owner-freebsd-hackers@FreeBSD.ORG Mon Feb 7 03:12:47 2011 Return-Path: Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 7AC2E1065670; Mon, 7 Feb 2011 03:12:47 +0000 (UTC) (envelope-from doconnor@gsoft.com.au) Received: from cain.gsoft.com.au (cain.gsoft.com.au [203.31.81.10]) by mx1.freebsd.org (Postfix) with ESMTP id F0BC78FC08; Mon, 7 Feb 2011 03:12:46 +0000 (UTC) Received: from ur.gsoft.com.au (Ur.gsoft.com.au [203.31.81.44]) (authenticated bits=0) by cain.gsoft.com.au (8.14.4/8.14.3) with ESMTP id p173CiOG028558 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=NO); Mon, 7 Feb 2011 13:42:44 +1030 (CST) (envelope-from doconnor@gsoft.com.au) Mime-Version: 1.0 (Apple Message framework v1082) Content-Type: text/plain; charset=us-ascii From: "Daniel O'Connor" In-Reply-To: Date: Mon, 7 Feb 2011 13:42:43 +1030 Content-Transfer-Encoding: quoted-printable Message-Id: <772B352C-7241-4326-8B49-3FB675896609@gsoft.com.au> References: <53A394ED-7C2E-4E4B-A9A7-CB5F1B27DBE3@gsoft.com.au> <7108E013-77D1-47F8-892E-5027DB7D432B@gsoft.com.au> <990005CD-39BD-45F6-BD07-ACEE79DF5A03@gsoft.com.au> To: Ivan Voras X-Mailer: Apple Mail (2.1082) X-Spam-Score: -2.51 () ALL_TRUSTED,BAYES_00,T_RP_MATCHES_RCVD X-Scanned-By: MIMEDefang 2.67 on 203.31.81.10 Cc: freebsd-hackers@freebsd.org Subject: Re: Scheduler question X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 07 Feb 2011 03:12:47 -0000 On 07/02/2011, at 13:02, Ivan Voras wrote: >>> I'll be looking at it on Monday, I will let you know :) >>=20 >> No luck with mlock() so it wouldn't appear to be paging is the issue = :( >=20 > I'm also interested in raw device vs file system access! Oops, sorry.. I just tried that now but it doesn't improve things :( I am writing directly to /dev/ad10 but stressing /dev/ad14 (sudo tar -cf = /dev/null /local0) It is interesting also that if I have md5's soaking up CPU then it's = much less likely to start streaming properly and generally bombs out = straight away. If I start it streaming and then start md5 it stays = running... (even if it's rtprio'd) -- Daniel O'Connor software and network engineer for Genesis Software - http://www.gsoft.com.au "The nice thing about standards is that there are so many of them to choose from." -- Andrew Tanenbaum GPG Fingerprint - 5596 B766 97C0 0E94 4347 295E E593 DC20 7B3F CE8C